The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 20, 2012
Filed:
Nov. 11, 2008
John Bomholt, Hinnerup, DK;
Flemming Hedegaard, Bjerringbro, DK;
Jorn Skjellerup Rasmussen, Bjerringbro, DK;
Neils Jorgen Strom, Hinnerup, DK;
John Bomholt, Hinnerup, DK;
Flemming Hedegaard, Bjerringbro, DK;
Jorn Skjellerup Rasmussen, Bjerringbro, DK;
Neils Jorgen Strom, Hinnerup, DK;
Grundfos Management a/s, Bjerringbro, DK;
Abstract
A method for testing a primary memory of control and regulation electronics of a frequency converter is described. The primary memory includes (i) at least one matrix of memory cells, (ii) means for addressing the at least one memory cell matrix, and (iii) a write/read circuit The method includes examining at least a part of the means for addressing with regard to address errors and examining at least a part of the memory cells with regard to cell errors. The examining steps are performed independently of one another. The examining at least a part of the means for addressing includes examining individual address bits of an n-bit wide address bus in steps that are performed independently of one another. The examining is dependent on use of the primary memory for operation of the frequency converter.